import type { Metadata } from "next";
import { Suspense } from "react";
import { CartContent } from "./components/CartContent";
import { RelatedProducts } from "./components/RelatedProducts";
import { TrustRow } from "../components/TrustRow";
import { Footer } from "../components/Footer";
import { getCartTrustBadges, getShippingMethods, getShippingSettings, getDefaultTaxRatePercent, getKleinunternehmer } from "../lib/payload";
import { hasActiveDiscountCode } from "../lib/discountServer";

// robots: noindex — transactional page (mirrors a specific shopper's cart
// contents), per the figma-to-nextjs skill's Step 5 guidance: indexing
// this wastes crawl budget and could surface cart state in search results.
export const metadata: Metadata = {
  title: "Warenkorb",
  description: "Dein Warenkorb bei einfach produktiv.",
  robots: {
    index: false,
    follow: true,
  },
};

export default async function CartPage() {
  const [trustBadges, shippingMethods, shipping, defaultTaxRate, kleinunternehmer, showDiscountField] = await Promise.all([
    getCartTrustBadges(),
    getShippingMethods(),
    getShippingSettings(),
    getDefaultTaxRatePercent(),
    getKleinunternehmer(),
    hasActiveDiscountCode(),
  ]);

  // The cart doesn't ask which shipping method the shopper wants yet
  // (that's /checkout) — it just estimates using the first active method
  // (Standard, by sortOrder) for the sidebar's "Versand" line, and shows
  // the FreeShippingBanner toward whichever active method's threshold is
  // lowest/easiest to reach (Express has none — it never goes free).
  const defaultShipping = shippingMethods[0] ?? null;
  const thresholds = shippingMethods
    .map((m) => m.freeShippingThreshold)
    .filter((t): t is number => t !== null);
  const freeShippingThreshold = thresholds.length > 0 ? Math.min(...thresholds) : null;

  return (
    <>
      <main className="flex flex-col flex-1 bg-bg-base">
        {/* Suspense required — CartContent uses useSearchParams() (?code=
            auto-apply, see its own comment) which opts any consumer into
            client-side rendering unless wrapped. fallback={null}: the cart
            itself is entirely client-rendered from localStorage anyway
            (see CartContent's own productsLoading handling), so there's no
            meaningful server-rendered content this would flash away from. */}
        <Suspense fallback={null}>
          <CartContent
            trustBadges={trustBadges}
            shippingCost={defaultShipping?.price ?? 0}
            freeShippingThreshold={freeShippingThreshold}
            shippingSettings={shipping}
            defaultTaxRate={defaultTaxRate}
            kleinunternehmer={kleinunternehmer}
            showDiscountField={showDiscountField}
          />
        </Suspense>
        <RelatedProducts defaultTaxRate={defaultTaxRate} kleinunternehmer={kleinunternehmer} />
        <TrustRow />
      </main>
      <Footer />
    </>
  );
}